Section 8. Operation
418
FIGURE 87: PGIA with Input Signal Decomposition
8.1.2.7.2 Voltage Measurement Mechanics
Measurement Sequence
An analog voltage measurement as illustrated in the figure
Simplified Voltage
Measurement Sequence
(p. 419),
proceeds as follows:
1. Switch
2. Amplify
3 Sync
4 Flush
5. Settle
6. A to D (24 bit delta sigma) with digital filter (fN1)
7. Measurement scaled with multiplier and offset
8. Scaled value placed in memory
Notes on CR6 voltage measurement (for the curious):
•
FN1 is in Hz and the measurement is integrated over a time of 1/fnotch.
With an fnotch of 50 the measurement is integrated over 20ms.
•
Pipeline and Sequential handle things a little bit differently (then there is
burst mode):
o
Sync: 6 mS for the voltage reference and everything to turn on,
calibrate, and get ready to make the measurement. This takes place
at the begining of scan if running in pipeline mode. If sequential
mode is used, each measurement will be preceded by this Sync time.
o
Flush: Another 850 µS to flush out the old data from the A to D.
Содержание CR6 Series
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Страница 76: ...Section 5 Overview 76 FIGURE 20 Half Bridge Wiring Example Wind Vane Potentiometer ...
Страница 80: ...Section 5 Overview 80 FIGURE 23 Pulse Input Wiring Example Anemometer ...
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Страница 251: ...Section 7 Installation 251 FIGURE 46 Running Average Frequency Response FIGURE 47 Running Average Signal Attenuation ...
Страница 454: ...Section 8 Operation 454 FIGURE 104 Narrow Sweep High Noise ...
Страница 459: ...Section 8 Operation 459 FIGURE 106 Vibrating Wire Sensor Calibration Report ...
Страница 535: ...Section 8 Operation 535 8 11 2 Data Display FIGURE 121 CR1000KD Displaying Data ...
Страница 537: ...Section 8 Operation 537 FIGURE 123 CR1000KD Real Time Custom ...
Страница 538: ...Section 8 Operation 538 8 11 2 3 Final Storage Data FIGURE 124 CR1000KD Final Storage Data ...
Страница 539: ...Section 8 Operation 539 8 11 3 Run Stop Program FIGURE 125 CR1000KD Run Stop Program ...
Страница 541: ...Section 8 Operation 541 FIGURE 127 CR1000KD File Edit ...
Страница 542: ...Section 8 Operation 542 8 11 5 PCCard Memory Card Management FIGURE 128 CR1000KD PCCard Memory Card Management ...
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Страница 549: ...Section 9 Maintenance Details 549 FIGURE 133 Separate Back Shell from Module FIGURE 134 Disconnect Battery Connector ...
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Страница 610: ...Section 11 Glossary 610 FIGURE 137 Relationships of Accuracy Precision and Resolution ...
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